Diffractive heavy pseudoscalar-meson productions by weak neutral currents
arXiv:hep-ph/0212088 · doi:10.1063/1.1607199
Abstract
A first theoretical study for neutrino-induced diffractive productions of heavy pseudoscalar-mesons, η_c and η_b, off a nucleon is performed based on factorization formalism in QCD. We evaluate the forward diffractive production cross section in perturbative QCD in terms of the light-cone wave functions of Z boson and η_{c,b} mesons, and the gluon distribution of the nucleon. The diffractive production of η_c is governed by the axial vector coupling of the longitudinally polarized Z boson to Q\bar{Q} pair, and the resulting η_c production cross section is larger than the J/ψone by one order of magnitude. The bottomonium η_b production, which shows up for higher beam energy, is also discussed.
5 pages with 3 embedded figures. Talk presented at the 15th International Spin Physics Symposium, Spin 2002, Brookhaven National Laboratory, September 9-14, 2002